Some people believe rape has to be a violent knife point attack down an alleyway.
If you want the long story short here is basically what happened.
Macdonald met a drunk girl on a busy street outside a takeaway and she willingly went back to his hotel room in a taxi, they went back to the hotel room and started going at it. When Evans found out Macdonald had a girl with him he turned up at the hotel room uninvited, lied to gain access to the room and then had sex with the victim. Macdonald and Evans both claim the victim said it was ok for him to join, Evans supposedly felt guilty about cheating on his partner so left through a fire exit and left the girl alone in the hotel room. The girl woke up, couldn't remember anything and contacted the police as she thought her drink may have been spiked, they tracked down Macdonald and Evans and they admitted all the above and were charged with rape.
Macdonald was found not guilty, he was on dodgy grounds, I think technically his sexual intercourse was non consensual as well but because of the events that took place before sex, like striking up a conversation and going back to the hotel room together it was decided Macdonald had acceptable reason to believe he did have consent. Because Evans just headed to the hotel room with the intention of having sex without knowing her or having spoken to her or any other reason which could signal consent it was decided this was rape.